998597903 has 2 divisors, whose sum is σ = 998597904. Its totient is φ = 998597902.

The previous prime is 998597863. The next prime is 998597909. The reversal of 998597903 is 309795899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998597903 - 2¹² = 998593807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998597909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499298951 + 499298952.

It is an arithmetic number, because the mean of its divisors is an integer number (499298952).

Almost surely, 2^998597903 is an apocalyptic number.

998597903 is a deficient number, since it is larger than the sum of its proper divisors (1).

998597903 is an equidigital number, since it uses as much as digits as its factorization.

998597903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5511240, while the sum is 59.

The square root of 998597903 is about 31600.5997253217. The cubic root of 998597903 is about 999.5324157324.

The spelling of 998597903 in words is "nine hundred ninety-eight million, five hundred ninety-seven thousand, nine hundred three".